Merge PR #8 from storybored379

Timeline: Slide moves linked audio with the video

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/commands.rs

@@ -1793,7 +1793,21 @@ fn build() -> Vec<CommandSpec> {
                 .map(Tick)
                 .or_else(|| p.get("deltaFrames").and_then(Value::as_i64).map(|f| s.sequence_rate().tick_of(f)))
                 .unwrap_or_default();
-            s.edit_sequence("Slide", |q, ctx, _| Ok(edit::slide(q, c, d, ctx)?))?;
+            let clips = with_links(s, &[c]);
+            s.edit_sequence("Slide", |q, ctx, _| {
+                // clamp across all linked partners, then slide them by the common delta
+                let mut dd = d;
+                for c in &clips {
+                    let x = edit::slide(&mut q.clone(), *c, dd, ctx)?;
+                    if x.abs() < dd.abs() {
+                        dd = x;
+                    }
+                }
+                for c in &clips {
+                    edit::slide(q, *c, dd, ctx)?;
+                }
+                Ok(())
+            })?;
             Ok(Value::Null)
         }),
         cmd!("timeline.rateStretch", "Rate Stretch", [], None, r#"{"clip":id,"edge":"in|out","delta":ticks}"#, has_seq, |s, p| {

crates/engine/src/tests.rs

@@ -83,6 +83,18 @@ fn trim_linked_and_ripple_delete() {
     assert_eq!(q.video_tracks[0].items[0].start, s.sequence_rate().tick_of(12), "the trim gap remains");
 }
 
+#[test]
+fn slide_moves_linked_audio_with_the_video() {
+    let mut s = demo();
+    let v = s.active_sequence().unwrap().video_tracks[0].items[1].clone();
+    s.execute("timeline.slide", json!({"clip": v.id.0, "deltaFrames": 5})).unwrap();
+    let q = s.active_sequence().unwrap();
+    let (_, nv) = q.find_item(v.id).unwrap();
+    let a = q.audio_tracks[0].items.iter().find(|i| i.link == v.link).unwrap();
+    assert_eq!(nv.start, v.start + s.sequence_rate().tick_of(5));
+    assert_eq!((a.start, a.source_in), (nv.start, nv.source_in), "linked audio slides too and stays in sync");
+}
+
 #[test]
 fn zero_fps_is_refused() {
     let mut s = demo();